<template>
    <el-breadcrumb class="app-breadcrumb" separator=">">
        <transition-group name="breadcrumb">
            <el-breadcrumb-item v-for="(item,index) in levelList" v-if="item.meta.title" :key="item.path">
                <!--                <span v-if="item.redirect==='noRedirect'||index===levelList.length-1" class="no-redirect">{{ item.meta.title }}</span>-->
                <!--                <a v-else @click.prevent="handleLink(item)">{{ item.meta.title }}</a>-->
                <span class="no-redirect">{{ item.meta.title }}</span>
            </el-breadcrumb-item>
        </transition-group>
    </el-breadcrumb>
</template>

<script>
    import pathToRegexp from 'path-to-regexp'

    export default {
        data() {
            return {
                levelList: null
            }
        },
        watch: {
            $route() {
                this.getBreadcrumb()
            }
        },
        created() {
            this.getBreadcrumb()
        },
        methods: {
            getBreadcrumb() {
                let matched = this.$route.matched.filter(item => {
                    if (item.name) {
                        return true
                    }
                })
                const first = matched[0]
                if (!first) {//为了第一次进入页面时面包屑中显示工作台
                    matched = [{ path: '/home', meta: { title: '工作台' } }].concat(matched)
                }
                if (first && (first.path === '/' || first.path === '/home')) {
                    matched = [{ path: '/home', meta: { title: '工作台' } }].concat(matched)
                }
                this.levelList = matched
            },
            pathCompile(path) {
                const { params } = this.$route
                let toPath = pathToRegexp.compile(path)
                return toPath(params)
            },
            handleLink(item) {
                const { redirect, path } = item
                if (redirect) {
                    this.$router.push(redirect)
                    return
                }
                this.$router.push(this.pathCompile(path))
            }
        }
    }
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
    .app-breadcrumb.el-breadcrumb {
        display: inline-block;
        font-size: 14px;
        line-height: 50px;
        margin-left: 10px;

        .no-redirect {
            color: #97a8be;
            cursor: text;
        }
    }
</style>
